AS17621 — CNCGROUP-SH China Unicom Shanghai network

AS17621 announces 318 IPv4 prefixes covering 806,144 addresses and 178 IPv6 prefixes.

About this network

CNCGROUP-SH is operated by China Unicom Shanghai.

What it's used for

• The address space carries netnames consistently labeled UNICOM-SH, indicating a regional telecommunications provider serving Shanghai.
• With 806,144 IPv4 addresses and 418 IPv6 prefixes announced against 50 observed neighbours, the high address-to-neighbour ratio suggests an access or eyeball network rather than a transit provider.

Notable

• All sampled registrants are IRT-CU-CN with netname UNICOM-SH, which aligns with the AS handle and the operator's identity.
• The inventory consists of 396 IPv4 prefixes, including large blocks such as 139.226.128.0/17 and 139.227.0.0/17, reflecting a substantial and finely subdivided address estate typical of a major carrier.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 27.115.0.0/18
• 27.115.64.0/20
• 27.115.81.0/24
• 27.115.82.0/23
• 27.115.84.0/22
• 27.115.88.0/21
• 27.115.96.0/19
• 43.243.148.0/22
• 43.250.146.0/23
• 43.254.224.0/22
• 58.246.0.0/17
• 58.246.128.0/19
• 58.246.160.0/23
• 58.246.162.0/24
• 58.246.164.0/24
• 58.246.166.0/23
• 58.246.168.0/21
• 58.246.176.0/20
• 58.246.192.0/21
• 58.246.200.0/22
• 58.246.204.0/23
• 58.246.206.0/24
• 58.246.208.0/21
• 58.246.216.0/22
• 58.246.224.0/19
• 58.247.0.0/18
• 58.247.64.0/19
• 58.247.96.0/20
• 58.247.112.0/22
• 58.247.116.0/23
• 58.247.119.0/24
• 58.247.120.0/21
• 58.247.128.0/18
• 58.247.192.0/21
• 58.247.200.0/22
• 58.247.208.0/22
• 58.247.216.0/21
• 58.247.224.0/20
• 58.247.240.0/21
• 58.247.248.0/22
• 58.247.252.0/23
• 59.81.64.0/23
• 59.81.106.0/23
• 103.38.232.0/22
• 103.61.190.0/24
• 103.108.244.0/24
• 103.111.64.0/24
• 103.140.14.0/23
• 103.144.159.0/24
• 103.164.32.0/24
• 103.231.16.0/24
• 103.234.131.0/24
• 103.250.192.0/22
• 106.75.224.0/19
• 112.64.0.0/19
• 112.64.36.0/22
• 112.64.40.0/22
• 112.64.44.0/24
• 112.64.46.0/23
• 112.64.48.0/20
• 112.64.65.0/24
• 112.64.66.0/23
• 112.64.68.0/22
• 112.64.72.0/21
• 112.64.80.0/20
• 112.64.96.0/20
• 112.64.114.0/24
• 112.64.116.0/22
• 112.64.120.0/21
• 112.64.128.0/21
• 112.64.136.0/22
• 112.64.140.0/23
• 112.64.142.0/24
• 112.64.144.0/20
• 112.64.160.0/19
• 112.64.192.0/20
• 112.64.208.0/22
• 112.64.212.0/23
• 112.64.214.0/24
• 112.64.216.0/21
• 112.64.224.0/21
• 112.64.232.0/23
• 112.64.234.0/24
• 112.64.238.0/23
• 112.64.240.0/20
• 112.65.0.0/20
• 112.65.16.0/22
• 112.65.20.0/23
• 112.65.22.0/24
• 112.65.24.0/21
• 112.65.32.0/19
• 112.65.65.0/24
• 112.65.67.0/24
• 112.65.68.0/22
• 112.65.76.0/22
• 112.65.80.0/21
• 112.65.88.0/22
• 112.65.92.0/23
• 112.65.95.0/24
• 112.65.96.0/20

and 396 more.

Upstream networks

• AS4837 CHINA UNICOM China169 Backbone
• AS9929 CHINA UNICOM Industrial Internet Backbone

Downstream networks

• AS37963 Hangzhou Alibaba Advertising Co.,Ltd.
• AS23853 Shanghai Data Solution Co., Ltd.
• AS9809 SHENZHEN NOVA TECHNOLOGIES DEVELOPMENT.,LTD.
• AS59083 Shanghai Kuanhui Tech. Co.,ltd
• AS146842 ChinaDataCom Corporation Limited
• AS45079 GDS CHANGAN SERVICES Ltd.
• AS10212 China Enterprise ICT Solutions Limited
• AS109 CISCO SYSTEMS, INC.
• AS24141 Shanghai DMT Information Network cor.,LTD.
• AS137759 MTS SYSTEM (China) Co.,Ltd
• AS56006 Shanghai Pudong Development Bank Co.,Ltd.
• AS139148 China UnionPay Co., Ltd
• AS63570 China Internet Network Information Center
• AS37965 Pacnet Business Solutions LTD
• AS10100 UBS Group AG
• AS17775 shanghai science and technology network communication limited company
• AS58850 Bloomberg Financial Information (Beijing) Co Ltd
• AS7609 Morgan Stanley Management Service (Shanghai) Limited
• AS38375 GSGH security LLC
• AS137758 Industrial and Commercial Bank of China Limited,ICBC
• AS56013 SAMSUNG SDS CHINA
• AS151247 HSBC Software Development (Guangdong) Limited Shanghai Branch
• AS38381 west wing no.157,dongsi west street Dongcheng, Beijing, China
• AS139138 Gopay Information Technology Co.,Ltd
• AS59019 Beijing Kingsoft Cloud Internet Technology Co., Ltd

Adjacent networks

• AS4837 CHINA UNICOM China169 Backbone
• AS37963 Hangzhou Alibaba Advertising Co.,Ltd.
• AS23853 Shanghai Data Solution Co., Ltd.
• AS9929 CHINA UNICOM Industrial Internet Backbone
• AS9809 SHENZHEN NOVA TECHNOLOGIES DEVELOPMENT.,LTD.
• AS59083 Shanghai Kuanhui Tech. Co.,ltd
• AS146842 ChinaDataCom Corporation Limited
• AS45079 GDS CHANGAN SERVICES Ltd.
• AS10212 China Enterprise ICT Solutions Limited
• AS109 CISCO SYSTEMS, INC.
• AS24141 Shanghai DMT Information Network cor.,LTD.
• AS137759 MTS SYSTEM (China) Co.,Ltd
• AS56006 Shanghai Pudong Development Bank Co.,Ltd.
• AS139148 China UnionPay Co., Ltd
• AS63570 China Internet Network Information Center
• AS37965 Pacnet Business Solutions LTD
• AS10100 UBS Group AG
• AS17775 shanghai science and technology network communication limited company
• AS58850 Bloomberg Financial Information (Beijing) Co Ltd
• AS7609 Morgan Stanley Management Service (Shanghai) Limited
• AS38375 GSGH security LLC
• AS137758 Industrial and Commercial Bank of China Limited,ICBC
• AS56013 SAMSUNG SDS CHINA
• AS151247 HSBC Software Development (Guangdong) Limited Shanghai Branch
• AS139138 Gopay Information Technology Co.,Ltd